Lower Extremity Quiz 2 Flashcards
What is the only Deep Gluteal Nerve that is superior to the piriformis?
Superior Gluteal Nerve
What is the largest nerve in the body?
Sciatic Nerve
What structures of the body does the Sciatic Nerve innervate?
- Skin of the foot and most of the leg
- Posterior Thigh (Hamstrings) and all of the leg and foot muscles.
What does the distal part of the sciatic nerve break off into?
- Common Fibular Nerve
- Tibial Nerve
What is Piriformis Syndrome?
When the Common Fibular Nerve is impinged due to the Piriformis compression.
Which directions do each of the branches of the sciatic nerve run?
- Tibial nerve is inferior to the piriformis
- Common Fibular nerve pierces the piriformis and passes superior to it.
What roots are part of the Posterior Cutaneous Nerve of the Thigh?
S1-S3
What does the Posterior Cutaneous Nerve of the Thigh Supply?
- Skin Sensation for the following:
1. Inferior part of the buttock
2. Skin of the Perineum
3. Posterior Thigh
4. Proximal Part of the Leg
What nerve runs laterally between the gluteus medius and minimus?
Superior Gluteal Nerve
What roots are involved with the Inferior Gluteal Nerve?
L5-S2
Superficial to the Sciatic Nerve
What does the Inferior Gluteal Nerve supply?
- Gluteus Maximus
What does the Superior Gluteal Nerve supply?
- Gluteus Medius
- Gluteus Minimus
- Tensor of Fascia Lata
What does the Nerve to Quadratus Femoris supply?
- Quadratus Femoris
- Inferior Gemellus
What does the Nerve to Obturator Internus supply?
Obturator Internus Muscle
What does the Trendelenburg Test indicate?
The side in which the person is shifting their weight towards has an insufficient or disabling Gluteus Medius.
Other signs would be lifting of the foot, waddling gait, or steppage gait
What are some signs that indicate Piriformis Syndrome?
- Patient is involved in sports that require excessive use of the gluteal muscles
- Hypertrophy of the Piriformis
- Spasms of the Piriformis
Name all of the posterior thigh muscles?
- Semitendinosus
- Semimembranosus
- Long Head of the Biceps Femoris
What are the main actions of the posterior thigh muscles?
- Hip Extension
- Knee Flexion
Patients with paralyzed hamstrings tend to what?
Fall forward as they cannot maintain posture. If they fall backwards then it is their psoas major/iliopsoas
What nerve innervates the posterior thigh muscles?
Tibial nerve except the short head of the bicep femoris which is common fibular.
Where does a hamstring strain usually occur?
Proximal-Medial attachments of the hamstrings with the ischial tuberosity
What can you see from a hamstring strain?
Bruise that falls on the distal side of the posterior knee
What is Hurdler’s Injury?
Inadequate stretching leads to forcible flexion of the hip causing avulsion of the ischial tuberosity from either the biceps femoris or semitendinosus
Where is Nelaton’s Line?
From the Anterior Superior Iliac Spine to the Ischial Tuberosity
What are infrapatellar fatpads?
Mass of loose fatty tissue on the sides of the patellar ligament
What can cause a leg length discrepancy?
A femoral fracture and now the legs are unequal in length.
You measure from ASIS to the distal tip of the medial malleolus on both sides. Difference must be greater than 1.25 cm to be abnormal
What is the Popliteal Fossa?
A diamond-shaped depression on the posterior aspect of the knee, containing the nerves and vessels from the thigh into the leg.
What are the borders of the Popliteal Fossa?
- Superolaterally: Biceps Femoris
- Superomedially: Semimembranosus and Semitendinosus
- Inferolaterally: Lateral Head of gastrocnemius
- Inferomedially: Medial Head of gastrocnemius
- Posterior: Skin and fascia
- Anterior: Popliteal surface of femur, Oblique Popliteal Ligament, Popliteal Fascia over the popliteus
What is inside of the Popliteal Fossa?
- Small Saphenous Vein
- Popliteal Arteries and Veins
- Tibial and Common Fibular Nerve
- Posterior Cutaneous Nerve of Thigh
- Popliteal Lymph Nodes and Lymphatic Vessels
Where does the Popliteal artery fall in the descent of the artery line? (Proximal to Distal)
- Femoral artery into Popliteal Artery
- Popliteal artery ends at the interior border of the popliteus splitting into…
- Anterior and Posterior Tibial Artery